Help with my door?
My guess is that the driver door lock solenoid itself may have an issue, since everything else seems to work normally. I've seen on other vehicles where they can function in one direction but not the other due to weakening solenoid.
There's always possibility that something may be interfering with the lock rod but either way you would need to remove door panel to verify.




To rule out the keyfob, maybe try a little experiment using the convenience closing feature (page 93 of manual). Leave the driver window down, exit the car and lock from outside with manual key so all doors are locked, then aim the keyfob at the driver door handle and press and hold in the lock button. If the car responds to the keyfob, then the window will close and the issue is likely in the door lock mechanism as Mud suggested.
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Another thing to check in the car, when you get in car and close driver door (still unlocked not driving yet), are you able to lock the driver door using central locking button on door? If so, then I'd rule out the door and focus just on the key.
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Interestingly I just fixed what seemed to be lazy or intermittent remote operation on our Silverado. Turned out the contactors for lock and unlock on the fob rubber buttons were a bit worn. I bought a new keyfob and swapped out the rubber button pad into our original keyfob as I didn't want to have to go to dealer to program new fob. Works great now.
I took the long way around mentioning this as it could be that the contractors in your keyfob may be dirty or a bit worn as well. Could be that a look inside may yield a fix. But if I recall you said you had only the one key for the car. IMO never a good idea, I suggest that you do get a second key. Speaking as someone who seems to misplace things sometimes....
Interestingly I just fixed what seemed to be lazy or intermittent remote operation on our Silverado. Turned out the contactors for lock and unlock on the fob rubber buttons were a bit worn. I bought a new keyfob and swapped out the rubber button pad into our original keyfob as I didn't want to have to go to dealer to program new fob. Works great now.
I took the long way around mentioning this as it could be that the contractors in your keyfob may be dirty or a bit worn as well. Could be that a look inside may yield a fix. But if I recall you said you had only the one key for the car. IMO never a good idea, I suggest that you do get a second key. Speaking as someone who seems to misplace things sometimes....




I wonder if one of those $125 of $250 service coupons could be used for this. One just expired on 9/30. Hopefully there will be another in December or January but that a long time to wait.


